A pigeon learns to peck only at a red disk. It will not peck at an identical disk of any other color. This illustrates the concept of ___________.

A) extinction
B) discrimination
C) avoidance training
D) desensitization

Discrimination

Bias and discriminatory actions against persons due to their race, age, or gender.

Pigeon

A bird of the family Columbidae, known for its ability to find its way home over long distances and commonly used in research in psychology.

Peck

A brief, pointed contact or strike, typically referring to the action of a bird using its beak.